1, story source: Thumbelina is a character in Andersen's fairy tales, and Princess and Pea are characters in Grimm's fairy tales.

2. Appearance and figure: Thumbelina is a very small girl, only as tall as her thumb. She was described as petite. Princess and the pea doesn't describe her figure, but her story revolves around her sensitivity to peas.

3. Story: Thumbelina tells the story of a little girl who was taken away by a frog and experienced a series of adventures. Finally, she found her family and happiness. The story of Princess and Pea is about a prince looking for a real princess and testing her sensitivity to peas to determine her identity.